/Engine/Source/Runtime/AnimationCore/Public/BoneWeights.h
Sets the minimum influence allowed. Any bone weight value below this threshold value is discarded. The threshold value is clamped to the half-closed interval (0, 1] since weight values of zero indicate no influence at all and are ignored completely.Bydefault, all non-zero weights are allowed.
[FBoneWeightsSettings](API\Runtime\AnimationCore\FBoneWeightsSettings) & SetWeightThreshold ( float InWeightThreshold )